package org.example.test.eight;

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.DeliverCallback;
import org.example.test.util.RabbitMQUtils;

import java.util.HashMap;
import java.util.Map;

/**
 * @Author: 以默
 * @Date: 2024/7/18 16:26
 *
 * 死信队列
 */
public class Consumer01 {
    public static final String NORMAL_EXCHANGE = "normal_exchange";
    // 死信队列的名称
    public static final String DEAD_EXCHANGE = "dead_exchange";

    // 普通队列的名称
    public static final String NORMAL_QUEUE = "normal_queue";
    // 死信队列的名称
    public static final String DEAD_QUEUE = "dead_queue";


    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMQUtils.getChannel();
        //声明死信和普通交换机
        channel.exchangeDeclare(NORMAL_EXCHANGE, BuiltinExchangeType.DIRECT);
        channel.exchangeDeclare(DEAD_EXCHANGE, BuiltinExchangeType.DIRECT);
        // 声明普通队列
        Map<String,Object> arguments = new HashMap<>();
        // 过期时间
//        arguments.put("x-message-ttl", 10000);
        //正常队列设置死信交换机
        arguments.put("x-dead-letter-exchange", DEAD_EXCHANGE);
        // 设置死信RoutingKey
        arguments.put("x-dead-letter-routing-key", "lisi");
        // 设置正常队列的长度的限制
//        arguments.put("x-max-length", 6);

        channel.queueDeclare(NORMAL_QUEUE, false, false, false, arguments);
        // 声明死信队列
        channel.queueDeclare(DEAD_QUEUE, false, false, false, null);
        // 绑定死信队列到死信交换机
        channel.queueBind(DEAD_QUEUE, DEAD_EXCHANGE, "lisi");
        // 绑定普通队列到普通交换机
        channel.queueBind(NORMAL_QUEUE, NORMAL_EXCHANGE, "zhangsan");

        System.out.println("等待接收消息...");
        DeliverCallback deliverCallback = (consumerTag, message) -> {
            String msg = new String(message.getBody(), "UTF-8");
            if(msg.equals("info5")){
                System.out.println("info5消息被拒绝");
                channel.basicReject(message.getEnvelope().getDeliveryTag(), false);//false表示消息不重新入队，true表示消息重新入队
            }else{
                System.out.println("Consumer01接收到消息是：" + msg);
                channel.basicAck(message.getEnvelope().getDeliveryTag(), false);
            }
        };//开启手动应答
        channel.basicConsume(NORMAL_QUEUE, false,deliverCallback,consumerTag -> {});
        // 死信队列
        // 1. 消息被拒绝并且requeue=false
        // 2. 消息TTL过期
        // 3. 队列达到最大长度
        // 普通交换机的名称

    }
}
